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Expired European patentEurope

A method of growing silicate glass layers employing a chemical vapour deposition process

EP 0031671 B1 · Applicant: FUJITSU LIMITED

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed December 17, 1980 and granted October 31, 1984. A European patent lasts at most 20 years from filing, so its term ended December 17, 2000.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by June 17, 2006.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledDecember 17, 1980
PublishedJuly 8, 1981
GrantedOctober 31, 1984
Term endedDecember 17, 2000
Application numberEP 80304550
Classification (CPC)H10P32/171 +2 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedDec 17, 1980PublishedJuly 8, 1981Patent grantedOct 31, 1984Term endedDec 17, 2000

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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